132 
Dr C. G. Gmelin’s Analys is of Cinnamon-stone. 
It is obvious, that the oxygen of the silica is equal to the oxy- 
gen of all the bases together. Professor Berzelius has given the 
following formula for the composition of cinnamon-stone, accord- 
ing to the analysis of Klaproth : SFS + 4CS-{-SAS. The 
formula according to the preceding analysis would be : FS + 
8CS + 10AS. But when it is observed that the colour of 
this mineral is a more or less dark one, and that it contains of 
course a larger or a smaller quantity of iron, it may be inferred 
that it cannot be decided with any precision, how far the iron 
ought to be considered as an essential basis, or only as a colour- 
ing matter; and it is obvious, that a change taking place in the 
quantity of iron, would change at the same time the whole for- 
mula. In such a case, therefore, no weight can, I think, be put 
upon the real signification of such a formula. 
The correctness of the statement of Klaproth respecting the 
composition of cinnamon-stone, is fully confirmed by the above 
analysis, conducted in a quite different manner. 
Art. XIV.—Aoifictf regarding the Island of Grim sey, off the 
North Coast of Iceland, and the Isles of St Kilda , on the 
North-West Coast of Scotland. 
1 . Island of Grimsey. 
J N the “ Magazine des Voyages r> of Nyerup, vol. iii. p. 312., 
there is a short account of an excursion in a fishing-boat from 
the north coast of Iceland to a small inhabited island about 
nineteen leagues from land. Mention is made of this island by 
its Danish name Grimsoe, in Olafsen and Povelsen’s Travels in 
Iceland, vol. ii. p. 624., and in those of Olavius, vol. ii. p. 230.; 
but these travellers have only spoken of it in a cursory manner, 
and it appears that no person had visited it from Iceland in the 
memory of any of the present inhabitants. It lies to the north 
of Fliot-Horn, one of the northern capes of Iceland, and is about 
twelve leagues within the polar circle. 
Mr Faber, the author of the narrative, who is known by a 
work on Ornithology, visited this island, with the object of exa- 
mining the sea-birds which resort to it in summer to breed. He 
